Method and apparatus for controlling toner density of copying de

Details Method and apparatus for controlling toner density of copying de Method and apparatus for controlling toner density of copying de

1987-05-26

1989-05-23

Prescott, A. C.

Photocopying

Contact printing

Light boxes

355246, 118663, 222DIG1, G03G 1508

Patent

active

048335061

ABSTRACT:
A toner density control method and apparatus of a copying device for copying continuously from a plurality of documents onto recording sheets optically detect the density of a patch image of a reference density plate formed on the surface of a photosensitive drum of the copying device so as to control the toner density. The patch image is formed prior to formation of an image of a first one of a plurality of the documents, the density of the patch image is detected, and a toner replenishment amount during a copying operation of the plurality of documents is maintained constant on the basis of the detected density.

REFERENCES:
patent: 4365889 (1982-12-01), Silverberg
patent: 4416535 (1983-11-01), Tottori
patent: 4462680 (1984-07-01), Ikeda
patent: 4466673 (1984-08-01), Champion et al.
patent: 4468112 (1984-08-01), Suzuki et al.
patent: 4502778 (1985-03-01), Dodge et al.
patent: 4506973 (1985-03-01), Ernst
patent: 4519695 (1985-05-01), Murai et al.

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